Crayon pencil sharpener



March 28, 1950 J. J. SIGMAN CRAYON PENCIL SHARPENER Filed Feb. 1, 1945INVENTOR ATTOR NEYS Patented Mar. 28, 1950 UNITED STATES PATENT OFFICECRAYON, PENCIL SHARPENER John J. Sigman, Cicero, Ill.

Application February 1, 1945, Serial No. 575,638

1 Claim. 1

This invention relates to crayon pencil sharpeners and has moreparticular reference to the sharpening of crayon pencils of the kindadapted for keeping bowling scores and like uses.

It is common practice in bowling alleys to use especially made crayonpencils for score keeping, with the crayon material or compositioncomprising the entire body of the. pencil and being of a diameter largerthan an ordinary lead pencil; consequently when sharpening the pencilthe shavings are entirely of crayon composition material. 'Invariablythese pencils are sharpened in haste and under circumstances whichresult in the shavings being carelessly dropped on the floor and notinfrequently on the playing floor. These crayon shavings because oftheir composition are readily picked up on the shoe soles and, being ofa sticky waxy character they are apt to seriously interfere with thefoot work of the player, impairing his score and possibly causingaccidents and physical injury.

My invention aims to provide an improved crayon pencil sharpening deviceand receptacle for the crayon shavings, so designed as to effectivelyserve the needs in keeping bowling scores and for similar uses. Infurtherance thereof, I have provided a structure of simple designadapted to be economically manufactured, one which may be quickly andeasily attached to a bowling score board in a position most convenientand accessible for use, which has a relatively large receptacle for thecrayon shavings and mounted so that it is firmly and securely supportedso as not to be displaced by careless jostling or handling but adaptedto be easily removed only by-a definite unlocking operation, and whichhas shaving edges constructed and arranged in a particularlyadvantageous manner.

Other objects and attendant advantages will be appreciated as theinvention becomes better understood by reference to the followingdescription when considered in connection with the accompanyingdrawings, in which- Figure 1 is a side elevation of a crayon pencilsharpener embodying my invention, attached to a bowling score board;

Fig. 2 is an enlarged top view of the sharpener removed from itsmounting, partly in section;

Fig. 3 is a side elevation of the sharpener on the scale shown in Fig.2;

Fig. 4 is a section through the cover part taken on the section line 4-4of Fig. 2, on a further enlarged scale;

Fig. 5 is a detail section on the section line 55 of Fig. 4;

Fig. 6 is a development view of the sharpening portion;

Fig. 7 is a fragmentary section substantially on the section line 'I'!of Fig. 4;

Fig. 8 is a detail view showing one of the locking lugs on the outerside of the shavings receptacle; and Fig. 9 is a detail section on anenlarged scale at the section line 44 at the right hand end thereof.

My invention contemplates the provision of a crayon pencil sharpenercharacterized by two main parts, namely, a combined supporting andsharpening part H and a receptacle part l2. These may be of any suitablematerial but they are designed preferably to be molded of Bakelite, orthermoplastic, or other composition material, so as to obtain a low costof manufacture and provide a structure sufliciently durable for thepurpose. The receptacle I2 is of cylindrical form having a closed bottomand open top and shaped on its lowe peripheral portion to provide flatportions l3 or the equivalent which provide an effective hand graspportion for turning the receptacle when inserting. and removing it fromthe cover support. The receptacle is further provided with looking lugsl4 and 15 which project outwardly at diametrically opposite locations onthe outer surface, in the present embodiment. The support part II has afiat top l6 and a depending side wall I! both of which are joined to anextension l8 in angular relation to the top and adapted for attachmentto a score board i9. In the preferred embodiment holes 2| are providedin the extension [8 adapted to receive fastening screws or bolts one ofwhich, such as 22, may also serve as part of the fastening means forholding the score paper on top of the board. As best shown in Figures 3,4 and 9 the depending wall I! is provided with an inwardly extendingflange 23 which is continuous except for slot openings 24 and 25 atdiametrically opposite locations, that is, corresponding with thelocation of the lugs l4 and [5. These openings 24-25 are adapted toreceive the lugs i4l 5 by upward movement of the receptacle to permitpositioning of these lugs above the flange 23 and then by slightrotative movement of the receptacle the lugs will be rotated to aposition above locking recesses 26 and 21 in the flange 23, and bylowering the receptacle its lugs i4-l5 will be received in the recesses26-21 and held therein against rotative displacement. In order toeffectively secure or look the receptacle in this position I haveprovided yielding spring means in the form 3 of a corrugated orundulated spring 28 which fits between the top of the flange 23 and theunder wall of the top I6 and extends entirely around the recess, beingat all times retained in the cover recess. Thus, when the receptacle isinserted into the holder it engages and compresses the spring and uponrotative movement to locate the locking lugs in the recess, the springexerts sufficient tension against the top of the receptacle to force itinto locking position and yieldingly hold it in such position. Theconstruction is such as to effectively retain the re ceptacle in thislocked position against accidental displacement or against becomingunfastened as a consequence of jostling. Thus, to remove the receptaclerequires definite disengagin operation consisting of lifting thereceptacle a definite distance and imparting rotative movementsufiicient to .bring the lugs into registration with the slots 24-45 sothat the receptacle may be lowered and removed.

connecting portion. The outer edges of these portions 32-33 are curvedoutwardly at 35,, so

as to be substantially coplanar when the member is bent to its finalform. The edge portions 35 will now be bevelled by a grinding operationor equivalent means to provide cutting edges extending from the centralportion 34 to the outer end of the sharpening member, these bevels beingformed on opposite sides of the member in order to properly locate thecutting edges, as will be presently apparent. The mem- .ber will now beformed by a stamping operation .to shape each member 32 and 33 insubstantially semi-circular form. The member will then be bent at thecentral portion by suitable die memhere to bring the semi-circularportions into coacting relation, making a conical receiver for thecrayon pencil with cutting edges diametrically disposed. The cuttingedge portions 31 and 38 will be bent inwardly as shown in Figure toposition the cutting edges inwardly from theinternai wall of the conemembe and to provide openings 39 and ll through which the shavings aredischarged. When the member is thus formed the edges 35 aresubstantially coplanar. The wider end of the cone member is theninsorted into a ferrule 22 which is threaded on its periphery. Theferrule may be suitably secured on 'thecone membe as by soldering 44',or otherwise. The cone member with its threaded ferrule will then bescrewed tightly into a threaded socket 33 formed in the underside of thetopwall l6, concentric with the opening 29. The open- 4 ing in the conesocket is the same diameter as the opening 29, thus forming a singleguide opening leading to the sharpening edges. Thus, upon insertion of acrayon pencil into the cone socket, it may be rotated by finger movementto perform a continuous sharpening operation. Because of the compositionmaterial the cutting by the edges 31-38 will be equally distributed andthe pencil body will be centralized in the cone socket, giving aconcentric point to the crayon pencil. The shavings will discharge intothe receptacle.

-It is believed that the foregoing conveys a clear understanding of theobjects prefaced above; and it should be understood that in thepractice. of my invention changes may be made in details of constructionwithout departing from the spirit and scope of the invention asexpressed in the appended claim, in which- I claim:

A crayon pencil sharpener of the character described comprising'ashavings receptacle and a cover therefor, the cover having apencil-receiving opening and a threaded opening at the inner side of andcoaxial therewith, and a crayon sharpening coneshaped member ,of sheetmetal stamped to provide two similar triangular shaped portions joinedtogether at an apex and each formed semi-circular in cross-section, saidmember being bent at its joined portion to bring each semi-circulartriangular portion into coactive matching relation with the otherforming a conical so t. h s d triangula o t on having a sharpened edgeoilset inwardly from the adjacent edge of the opposite portion toprovide shavings clearance passages, and an externally threaded ferrulein which the open end of the n a ed memb is fixed, sa d fe l b inscrewed into said threaded opening whereby to support said conicalsocket member with its open end' coaxial with the pencil-receivingopening at the receptacle side thereof.

JOHN J SIGMAN.

9E5 CIT D The following references are of record in the file ,of thispatent:

UNITED STATES PATENTS

